... 30 inch.W.T max 50MMcarbon steel pipe All of the products we are supplying can reach the international standard ... UNI, JIS, GOST, ANSI, ISO. The range of our products are (1)SMLS :OD 1/4 inch-30inch W.T ... inch.W.T max 50MM carbon steel pipe All of the products we are supplying can reach the international standard ... UNI, JIS, GOST, ANSI, ISO. The range of our products are (1)SMLS :OD 1/4 inch-30inch W.T ...